What are some sensations we are aware of? (6)
Aware: Touch, pain, visual input, sounds, smells, taste.
Motor: walking, running, throwing, chewing, smiling.
Autonomic NS (involuntary, w/o consious thought)
Sensory; sensatons we're not consiously aware of (name a few)
Motor (name a few)
- 1) Blood pressure change
- 2) Light entering the eye
- 3) Food in stomach
- 1) Constrict/dilate of arteries
- 2) Sweating
- 3) Heart rate speed
Is the autonomic and somatic motor response dependent of each other?
Yes, they depend on each other.
- 1) We smell s/th good and start to salivate.
- 2) We hear a car accident and our heart beats faster.
- 3) We work out and our mouth gets dry.
Muscle excitation/inhibition of the target.
Somatic motor system causes which of the two?
Autonomic motor system causes which of the two?
Somatic: ALWAY causes excitation of the target.
Autonomic: excitation & inhibition of the target.
What are the two different divisions of the Autonomic NS?
Where do the cell bodies originate?
What NT is released?
What is the result of the released NT to the Autonomic NS?
Contains what muscle/areas?
- 1) Sympathetic Division
- -Cell bodies orignate from CNS
- -Releases ACh from Pre-synaptic neuron.
- -NT = norepinephrine (causes increase in Symp)
- -Smooth, cardiac, & glands
- 2) Parasympathetic Division
- -Releases ACh (as sympathetic)
- -Smooth, cardiac, & glands.
Somatic Sensory (voluntary motor control; skeletal muscles)
Review the 5 parts it contains.
What NT does Sympathetic release?
What NT does the Para release?
*Both release ACh as NT from Pre-synaptic Neuron.
c) Exception (ONLY Symp): travels to adrenal medulla (glands on top of kidney)
-What does it release?
-Aka what "rush?"
d) Somatic motor, where are the cell bodies located?
-What do they relase?
- c) Releases "Adrenaline", which may/may not activate by neurons of pre-synaptic neuron.
- -Epinephrine & Norepinephrine
- *Adrenaline rush (fight or flight)
- d) Cell bodies located in anterior horn.
- -Releases ACh
- -Always cause excitation
Components of Autonomic (Motor) NS
Parasympathetic (Craniosacral) Division
-What is the origin?
-What is the function?
Sympathetic (Thoracolumbar) Division
(pre-synaptic leaves the spinal cord in this division)
When is epi/nore released in large quantities?
- -brainstem nuclei & S2-S4 of spinal cord
- -Function: "rest or digest"
- 1) Increases GI tract
- 2) Increase salivary glands
- 3) Increase Lacrimal gland
- 4) Lens thickens to focus close objects
- 5) Decrease HR
- -neurons in lateral horns of T1-L2 regions of spinal cord.
- -Function: "fight/flight" response
- 1) Activated in emergency situations.
- 2) Homeostasis
- 3) Physical activity
- 4) Increase HR
- 5) Decrease GI
- 6) Decrease salivary glands
- 7) Decreases lacrimal gland
- 8) Lens: thinner
- *Large quantities of dumping of epinephrine/norepinephrine ONLY to a response to a real emergency situation
Parasymp. Component of Oculomotor Nerve
What does this cause in the eye? (2)
- Parasymp. from oculomotor nerve causes:
- 1) constriction of pupil and
- 2) thickening of the lens.
- para = pupil (thickens/thins)
- sympa = lens (constricts/dilates)
Parasymp. Comonent of Facial Nerve.
- 1) Ptergyopalatine ganglion (to lacrimal gland)
- 2) Submandibular ganglion (to salivary gland)
- 1) lacrimation (tear production)
- 2) salivation (from submandibular/sublingual salivary glands)
Parasymp. Component of Glossopharyngeal Nerve
Parasymp. Component of Vagus Nerve "wanderer"
- 1) Decreased respiratory & HR
- 2) Increase action of digestive system
What is the sympathetic "chain" ganglia?
Sympathetics ONLY travel to these two areas that Parasympathetics will NOT.
This organ contains what muscle?
*Para will go anywhere Sympa will go except these exceptions.
Contains erector pili muscles (smooth muscle)
2) Sweat glands
What are Splanchnic nerves? (neurons)
How neurons from 'chain" ganglia to cavity/organs.
*Know the Splanchnic Nerve location and function.
*Know effect of ANS on: (pink table on slide)